We don't tent camp, but we do camp in a pop up, and lets face it. that thing is not locked and even if it was, getting into it would be as simple as unzipping or unvelcroing any part of it.
That being said, we have never worried about our stuff while camping (at FW or anyplace else). Of course any cameras, personal ID's, wallets, money and travelers checks are either with us or locked in the car. I do believe that there is a safe at the front office of FW that you can put stuff in if you wish. We have never felt the need to do this. (We do however lock up our valuables in our room safe if not camping.)
- lori